[hotfix] Remove any user-provided total Flink memory settings

Author: mxm

Diff for: flink-autoscaler/src/main/java/org/apache/flink/autoscaler/tuning/MemoryTuning.java

@@ -169,6 +169,7 @@ public static ConfigChanges tuneTaskManagerMemory(
         // memory pools, there are no fractional variants for heap memory. Setting the absolute heap
         // memory options could cause invalid configuration states when users adapt the total amount
         // of memory. We also need to take care to remove any user-provided overrides for those.
+        tuningConfig.addRemoval(TaskManagerOptions.TOTAL_FLINK_MEMORY);
         tuningConfig.addRemoval(TaskManagerOptions.TASK_HEAP_MEMORY);
         // Set default to zero because we already account for heap via task heap.
         tuningConfig.addOverride(TaskManagerOptions.FRAMEWORK_HEAP_MEMORY, MemorySize.ZERO);

Diff for: flink-autoscaler/src/test/java/org/apache/flink/autoscaler/tuning/MemoryTuningTest.java

@@ -124,6 +124,7 @@ jobVertex1, new ScalingSummary(50, 25, Map.of()),
 
         assertThat(configChanges.getRemovals())
                 .containsExactlyInAnyOrder(
+                        TaskManagerOptions.TOTAL_FLINK_MEMORY.key(),
                         TaskManagerOptions.TASK_HEAP_MEMORY.key(),
                         TaskManagerOptions.MANAGED_MEMORY_SIZE.key(),
                         TaskManagerOptions.MANAGED_MEMORY_SIZE